[kbuild-all] [agd5f:drm-next 269/428] drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c:56:6: warning: no previous prototype for function 'mmhub_v1_7_setup_vm_pt_regs'

tree: https://gitlab.freedesktop.org/agd5f/linux.git drm-next head: e90c92dc6b09574f7fe2e7e5774a3af30e36c632 commit: fd9d8dc1638adf32164cd193773415154f71fa5f [269/428] drm/amdgpu: Clean up mmhub functions for aldebaran config: x86_64-randconfig-a014-20210308 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project cd9a69289c7825d54450cb6829fef2c8e0f1963a) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git git fetch --no-tags agd5f drm-next git checkout fd9d8dc1638adf32164cd193773415154f71fa5f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): void mmhub_v1_7_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid, ^ drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c:56:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void mmhub_v1_7_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid, ^ static 1 warning generated. vim +/mmhub_v1_7_setup_vm_pt_regs +56 drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c f37945d50ff519 Le Ma 2020-09-05 55 f37945d50ff519 Le Ma 2020-09-05 @56 void mmhub_v1_7_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid, f37945d50ff519 Le Ma 2020-09-05 57 uint64_t page_table_base) f37945d50ff519 Le Ma 2020-09-05 58 { f37945d50ff519 Le Ma 2020-09-05 59 /* two registers distance between regVM_CONTEXT0_* to regVM_CONTEXT1_* */ f37945d50ff519 Le Ma 2020-09-05 60 int offset = regVM_CONTEXT1_PAGE_TABLE_BASE_ADDR_LO32 f37945d50ff519 Le Ma 2020-09-05 61 - regVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32; f37945d50ff519 Le Ma 2020-09-05 62 f37945d50ff519 Le Ma 2020-09-05 63 WREG32_SOC15_OFFSET(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32, f37945d50ff519 Le Ma 2020-09-05 64 offset * vmid, lower_32_bits(page_table_base)); f37945d50ff519 Le Ma 2020-09-05 65 f37945d50ff519 Le Ma 2020-09-05 66 WREG32_SOC15_OFFSET(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32, f37945d50ff519 Le Ma 2020-09-05 67 offset * vmid, upper_32_bits(page_table_base)); f37945d50ff519 Le Ma 2020-09-05 68 } f37945d50ff519 Le Ma 2020-09-05 69 :::::: The code at line 56 was first introduced by commit :::::: f37945d50ff5194449ae1a8f53e862c2bcf43464 drm/amdgpu: add mmhub support for aldebaran (v3) :::::: TO: Le Ma <le.ma(a)amd.com&gt; :::::: CC: Alex Deucher <alexander.deucher(a)amd.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org